Car jack



March 30, 1937. I g, KUNAT 2,075,398 Y I I'CAR TACK v Filed March 20, 1955' awn Mar. 30, 1937 UNITED S ATE GAB JACK Paul Kunath, Dresden, Germany Application March 20, 1935.

In Germany latter. The supports, or a majority thereof, are

capable of adapting themselves to ground conditions and of being adjusted so that they take 7 up the lateral pressure exerted by the car upon the jack which, evenif it is placed. on slanting ground, cannot slip any more, and thejacked up car is therefore prevented from tilting.

By way of example, the invention is illustrated in the accompanying drawing, in which Figure 1 is a side view of the jack; Fig. 2, a front view of a support; Figs. 3 and 4 show the arrangement of aplurality of supports; and Figs. 5 and 6 show how a support is automatically raised and lowered.

The lack according to the invention may have a hydraulic, pneumatic or mechanical drive, the construction shown employing a toothed wheel drive; The jack comprises the standard -I, the base plate 2, the extensible ram 3 and the lift- 'ing head 4, the ram '3 being elevated by. the turning of the toothed wheels 5 and B. At the top end of the standard I, as indicated in Fig. 3, or at the top end of the ram 3, as shown in Fig. 1,, and in case ofa plurality of telescopic rams at the lowest ram portion, a ring or flange 1 is rotatably disposed to which a support 8 or a plurality thereof, asshown in Figs. 3 and 4, are:

articulated-by means of ball-joints 9 or hinge -bolts. To insure a firm stand of the suppor they have forked ends i0.

If the car to be lifted-is in an inclined posi tion, it is possible, while the jack is placed under the car, to bring the support or. sup rts 8 40 easily into any supporting position byturning the ring or flange I. The arrangement of the jack with the support or supports 8 under the car is facilitated by lifting the support or supports by means of the disc ll which has a large bore I! and is placed laterally under the support or supports. A spring l3 presses the disc ll up against the support 8 which is thus raised 4 approximately horizontally and clamped by the spring, as indicated in Fig. 5. When the ram 3 is elevated from the position of Fig. 5, the disc II is pressed up by the spring l3 which is thereby relievedof tension, so that the disc is SerlalNo. 12,61: number, 1934 pushed laterally by the weight of the support 8, as indicated in Fig. 6, which now rests\on the floor or ground and is pressed into it. when the support 8 is firmly pressed into the ground, the ring or flange 'I cannot rotate any more, I

- and the support firmly enga es the standard i and prevents it from toppling over. The support or supports 8 may within themselves to permit telescoping for transport and facilitate packing of the jack.

I claim:-='- 1. A car jack, comprising a standard, a movable ramin said standard, means for moving said ram, a rotatable ring atthe top end of the standard, a plurality of supports for laterally supporting the jack to prevent toppling over and slipping, and means for articulating said supports to said ring to-insure universal motion of said'supports.

-2. A carjack, comprising a standard, a mov- 20 able ram in. said standard, means for moving be extensible said ram, a rotatable ring on said ram, a plu-A rality of supports for, laterally supporting the jack to prevent toppling over and slipping, and

means for articulating said supports to said ring to insure universal motion of said supports. a 3. A car jack comprising a standard, a movable ram in said standard, means for'movin said ram, a rotatable ring at the top of said standard, a plurality of supports having pointed lowerjends for laterally supporting the jack to prevent toppling over and slipping, means for articulating said supports to said ring to insure universal motion of said supports, a disc disto engage the ground with their pointed ends. 4. A car jack according to claim 3, wherein the supports have forked lower endswhich with their points enter the ground.

. PAUL KUNATH.

posed on said ram between said standard and ro-- 

